java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 01:37:27,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 01:37:27,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 01:37:27,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 01:37:27,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 01:37:27,133 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 01:37:27,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 01:37:27,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 01:37:27,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 01:37:27,135 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 01:37:27,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 01:37:27,135 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 01:37:27,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 01:37:27,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 01:37:27,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 01:37:27,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 01:37:27,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 01:37:27,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 01:37:27,136 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 01:37:27,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 01:37:27,137 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 01:37:27,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 01:37:27,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 01:37:27,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 01:37:27,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 01:37:27,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 01:37:27,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 01:37:27,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 01:37:27,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 01:37:27,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 01:37:27,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 01:37:27,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 01:37:27,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 01:37:27,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 01:37:27,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 01:37:27,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 01:37:27,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 01:37:27,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 01:37:27,185 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 01:37:27,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-09-08 01:37:27,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5a88ac6/801028a1414740a88c9f005f3ba4587c/FLAGbc7983582 [2019-09-08 01:37:27,686 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 01:37:27,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-09-08 01:37:27,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5a88ac6/801028a1414740a88c9f005f3ba4587c/FLAGbc7983582 [2019-09-08 01:37:28,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5a88ac6/801028a1414740a88c9f005f3ba4587c [2019-09-08 01:37:28,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 01:37:28,069 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 01:37:28,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 01:37:28,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 01:37:28,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 01:37:28,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6bd940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28, skipping insertion in model container [2019-09-08 01:37:28,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,086 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 01:37:28,104 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 01:37:28,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 01:37:28,278 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 01:37:28,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 01:37:28,311 INFO L192 MainTranslator]: Completed translation [2019-09-08 01:37:28,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28 WrapperNode [2019-09-08 01:37:28,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 01:37:28,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 01:37:28,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 01:37:28,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 01:37:28,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... [2019-09-08 01:37:28,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 01:37:28,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 01:37:28,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 01:37:28,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 01:37:28,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 01:37:28,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 01:37:28,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 01:37:28,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-09-08 01:37:28,494 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-09-08 01:37:28,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 01:37:28,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 01:37:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-09-08 01:37:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-09-08 01:37:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 01:37:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 01:37:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 01:37:28,653 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 01:37:28,654 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 01:37:28,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 01:37:28 BoogieIcfgContainer [2019-09-08 01:37:28,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 01:37:28,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 01:37:28,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 01:37:28,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 01:37:28,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 01:37:28" (1/3) ... [2019-09-08 01:37:28,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79275aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 01:37:28, skipping insertion in model container [2019-09-08 01:37:28,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 01:37:28" (2/3) ... [2019-09-08 01:37:28,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79275aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 01:37:28, skipping insertion in model container [2019-09-08 01:37:28,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 01:37:28" (3/3) ... [2019-09-08 01:37:28,663 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-09-08 01:37:28,672 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 01:37:28,680 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 01:37:28,696 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 01:37:28,727 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 01:37:28,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 01:37:28,728 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 01:37:28,728 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 01:37:28,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 01:37:28,728 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 01:37:28,728 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 01:37:28,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 01:37:28,729 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 01:37:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-08 01:37:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 01:37:28,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 01:37:28,753 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 01:37:28,755 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 01:37:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 01:37:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-09-08 01:37:28,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 01:37:28,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 01:37:28,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 01:37:28,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 01:37:28,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 01:37:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 01:37:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 01:37:28,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 01:37:28,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-08 01:37:28,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 01:37:29,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 01:37:29,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 01:37:29,028 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-09-08 01:37:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 01:37:29,129 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-09-08 01:37:29,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 01:37:29,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-08 01:37:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 01:37:29,137 INFO L225 Difference]: With dead ends: 42 [2019-09-08 01:37:29,137 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 01:37:29,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 01:37:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 01:37:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-09-08 01:37:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 01:37:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-08 01:37:29,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-09-08 01:37:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 01:37:29,182 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-08 01:37:29,182 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 01:37:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-08 01:37:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-08 01:37:29,184 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 01:37:29,184 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 01:37:29,184 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 01:37:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 01:37:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-09-08 01:37:29,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 01:37:29,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 01:37:29,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 01:37:29,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 01:37:29,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 01:37:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 01:37:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 01:37:29,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 01:37:29,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 01:37:29,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 01:37:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 01:37:29,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 01:37:29,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 01:37:29,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 01:37:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 01:37:29,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 01:37:29,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-09-08 01:37:29,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 01:37:29,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 01:37:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-09-08 01:37:29,406 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2019-09-08 01:37:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 01:37:29,487 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-08 01:37:29,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 01:37:29,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-09-08 01:37:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 01:37:29,490 INFO L225 Difference]: With dead ends: 30 [2019-09-08 01:37:29,490 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 01:37:29,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-08 01:37:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 01:37:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-09-08 01:37:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 01:37:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-08 01:37:29,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-09-08 01:37:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 01:37:29,508 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-08 01:37:29,508 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 01:37:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-08 01:37:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-08 01:37:29,510 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 01:37:29,511 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 01:37:29,512 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 01:37:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 01:37:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-09-08 01:37:29,513 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 01:37:29,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 01:37:29,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 01:37:29,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 01:37:29,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 01:37:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 01:37:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 01:37:29,588 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-08 01:37:29,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 01:37:29 BoogieIcfgContainer [2019-09-08 01:37:29,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 01:37:29,609 INFO L168 Benchmark]: Toolchain (without parser) took 1538.91 ms. Allocated memory was 134.7 MB in the beginning and 201.9 MB in the end (delta: 67.1 MB). Free memory was 91.6 MB in the beginning and 117.4 MB in the end (delta: -25.8 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. [2019-09-08 01:37:29,610 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 134.7 MB. Free memory was 109.3 MB in the beginning and 109.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-09-08 01:37:29,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.68 ms. Allocated memory is still 134.7 MB. Free memory was 91.4 MB in the beginning and 82.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-08 01:37:29,612 INFO L168 Benchmark]: Boogie Preprocessor took 123.96 ms. Allocated memory was 134.7 MB in the beginning and 201.9 MB in the end (delta: 67.1 MB). Free memory was 82.3 MB in the beginning and 179.6 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2019-09-08 01:37:29,613 INFO L168 Benchmark]: RCFGBuilder took 217.50 ms. Allocated memory is still 201.9 MB. Free memory was 179.6 MB in the beginning and 168.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-08 01:37:29,614 INFO L168 Benchmark]: TraceAbstraction took 950.12 ms. Allocated memory is still 201.9 MB. Free memory was 168.6 MB in the beginning and 117.4 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2019-09-08 01:37:29,618 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 134.7 MB. Free memory was 109.3 MB in the beginning and 109.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.68 ms. Allocated memory is still 134.7 MB. Free memory was 91.4 MB in the beginning and 82.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.96 ms. Allocated memory was 134.7 MB in the beginning and 201.9 MB in the end (delta: 67.1 MB). Free memory was 82.3 MB in the beginning and 179.6 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 217.50 ms. Allocated memory is still 201.9 MB. Free memory was 179.6 MB in the beginning and 168.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 950.12 ms. Allocated memory is still 201.9 MB. Free memory was 168.6 MB in the beginning and 117.4 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 17 SDslu, 89 SDs, 0 SdLazy, 45 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1128 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...